발간논문

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Vol.31, No.9, 1191 ~ 1201, 1993
Title
Effect of Heat - Treatment Conditions on the Morphology and the Composition of the Precipitates at the Prior Austenite Grain Boundary in Boron Steel
정인상In Sang Chung, 조삼규Sam Gyu Cho
Abstract
Effects of cooling rate, quenching temperature and holding time on the morphology and the composition of the precipitates at the prior austenite grain boundary were investigated in boron steel. Morphology of the precipitate was plate type and independent of quenching temperature and holding time. But the increase in the cooling rate decreases the thickness and length of the precipitates. The precipitate at the prior austenite grain boundary was Fe₃(CB) and independent of cooling rate, quenching temperature and holding time. Boron content in Fe₃(CB) was 7.5at% at 20℃/sec and 11.0 at% at 1℃/ sec.
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